As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WOULD NOT PRESSURIZE DURING FLIGHT. CLIMB WAS HALTED AT 11,500 DECENT TO 10,000. UNPRESSURIZED FLIGHT PROCEDURE APPLIED VIA QRH. INTERROGATED MDC MSG AND FOUND ID B1-006165. REF FIM TASK 21-32-01-810-801. FOUND OUTFLOW VLV INOP. R&R OUTFLOW VALVE IAW AMM 21-32-01. OPC GOOD. PRESSURIZE THE AIRCRAFT FOR MAINTENANCE IAW AMM 21-31-00. PRESSURIZATION GOOD.